Redcat Racing 19 x 10 x 5mm Bearing, 4-Piece Bearing 19105 4P RC Car Parts : 07159 Genuine Redcat Racing Parts For troubleshooting and warranty information please contact a Redcat Racing Customer Service Specialist at 602-454-6445 or by emailing amazonsupport@redcatracing.com NOTE: Please read the User Manual before use.